Selection of 29 architectural projects that contain an auditorium that have been finished from the year 2000 until the present, that is to say, within the first decade of the XXI century and located in Europe, (Spain, France, Luxembourg, England,...), and also North America, South America, Asia and Australia. The buildings are introduced with a brief general description, with high quality floor plans and photographs, concentrating on providing details about the auditoriums, their interiors and furnishings. The book starts off with a brief illustrated overview on the evolution of theatres and auditoriums throughout the history of architecture, from ancient times to the present day. There are also some brief interviews with various creators who explain their own design process. There are projects belonging to outstanding architects such as Jean Nouvel, Norman Foster, Ricardo Bofill, Rafel de La-Hoz, Estudio Cano Laso, COX, MBM, Oscar Tusquets, Navarro Baldeweg, and Cesar Pelli amongst others.